Donald, an aggressive butterfly collector, is hired by Sir Gnattbugg-Mothley to go to Africa and bring back an Almostus Extinctus, rarest of butterflies. In Africa, the ducks are sabotaged by Professor Angus McFiendly, who is also after the Almostus Extinctus, and Donald is forced to give him the butterfly when the nephews are captured by cannibals hired by McFiendly.